31020131310213 has 16 divisors (see below), whose sum is σ = 41504181857600. Its totient is φ = 20608156999296.

The previous prime is 31020131310167. The next prime is 31020131310241. The reversal of 31020131310213 is 31201313102013.

It is a happy number.

It is not a de Polignac number, because 31020131310213 - 2⁸ = 31020131309957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31020131310213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020131310283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7401520 + ... + 10808457.

It is an arithmetic number, because the mean of its divisors is an integer number (2594011366100).

Almost surely, 2^{31020131310213} is an apocalyptic number.

It is an amenable number.

31020131310213 is a deficient number, since it is larger than the sum of its proper divisors (10484050547387).

31020131310213 is a wasteful number, since it uses less digits than its factorization.

31020131310213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18211956.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 31020131310213 its reverse (31201313102013), we get a palindrome (62221444412226).

The spelling of 31020131310213 in words is "thirty-one trillion, twenty billion, one hundred thirty-one million, three hundred ten thousand, two hundred thirteen".